A: Mass of 1 gram molecule of `H_(2)SO_(4)` is 98 gram.
R: One gram atom contains `N_(A)` atoms.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion
C. If Assertion is true statement but Reason is false
D. If both Assertion and Reason are false statements

Answer

To solve the given question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that the mass of 1 gram molecule of `H₂SO₄` is 98 grams.
- The term "1 gram molecule" is typically interpreted as "1 mole" of the substance. Therefore, we need to confirm that the molar mass of `H₂SO₄` is indeed 98 grams.

2. **Calculating the Molar Mass of `H₂SO₄`**:
- The molecular formula for sulfuric acid is `H₂SO₄`.
- To calculate the molar mass:
- Hydrogen (H): 2 atoms × 1 g/mol = 2 g/mol
- Sulfur (S): 1 atom × 32 g/mol = 32 g/mol
- Oxygen (O): 4 atoms × 16 g/mol = 64 g/mol
- Adding these together:
\[ \text{Molar mass of } H₂SO₄ = 2 + 32 + 64 = 98 \text{ g/mol} \]
- Therefore, the assertion is correct.

3. **Understanding the Reason**:
- The reason states that "one gram atom contains `N_A` atoms."
- The term "1 gram atom" refers to 1 mole of an element, which indeed contains Avogadro's number of atoms (`N_A` ≈ \(6.022 \times 10^{23}\) atoms).

4. **Evaluating the Relationship**:
- While both statements are true, the reason does not directly explain the assertion. The assertion is about the molar mass of a compound, while the reason discusses the number of atoms in a mole of an element.

5. **Conclusion**:
- Both the assertion and reason are true, but the reason does not provide a correct explanation for the assertion. Thus, the correct answer is that both statements are true, but the reason is not the correct explanation.

### Final Answer:
The correct option is: Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

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